The Solution of the Pyramid Problem or, Pyramide Discoveries with a New Theory as to their Ancient UseEbookThe Solution of the Pyramid Problem or, Pyramide Discoveries with a New Theory as to their Ancient UsebyBallard RobertRating: 0 out of 5 stars0 ratingsSave The Solution of the Pyramid Problem or, Pyramide Discoveries with a New Theory as to their Ancient Use for later